Integrated dishwashers can use a floor light or projection to indicate status, but colours and patterns are model specific. A lit spot does not universally mean finished or faulty.
Understanding this situation
A projection can also be difficult to see on a particular floor or in bright light. Its visibility should be distinguished from the appliance actually losing power or stopping.
A useful next step
Check the manual's indicator explanation and the control display when safely accessible. Report a changed light separately from washing performance. Do not reset the entire machine solely because the projection looks different on a new floor surface.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.